Sash-lock.



Patented sept. 9, I902.

E. P. ARMSTRONG.

SASH LOCK.

(Application filed May 7, 1902. (No Model.)

WITNESSES." I 4 INVENTORV I 5, %f% 6MM9%Z% ATTORNEY.

w: NORRIS Packs m, mom-mum. WASHINGTON o. c.

UNITED STATES PATENT OFFICE.

ERNEST PAYNE ARMSTRONG, OF COLORADO SPRINGS, COLORADO.

SASH-LOC K.

SPECIFICATION forming part of Letters Patent No. 708,61 1, datedSeptember 9, 1902. Application filed May 7, 1902. Serial No. 106,347.(No model.)

To all whom it may concern:

Be it known that I, ERNEST PAYNE ARM- STRONG, a citizen of the UnitedStates of America, residing at Colorado Springs,in the county of El Pasoand State of Colorado, have invented certain new and useful Improvementsin Sash-Locks; and I do declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same, referencebeing had to the accompanying drawings, and to the figures of referencemarked thereon, which form a part of this specification.

My invention relates to improvements in sash locks and holders, myobject being to provide a device of this class which shall be simple inconstruction, economical in cost, reliable, durable,and efficientin use;and to these ends theinvention consists of the. features, arrangements,and combinations hereinafter described and claimed, all of which will befully understood by reference to the accompanying drawings, in which isillustrated an embodiment thereof.

In the drawings, Figure 1 is a front view showing my improvementsapplied to one of the vertical or side rails of the window-sash, thedevice being shown in the position to lock the window against downwardmovement, but permitting it to be raised. Fig. 2 shows the cam-disk inposition to leave a clearance between it and the window-frame. Fig. 3shows the cam-disk in position to lock the window against upwardmovement, but permitting it to be lowered or moved downwardly. Fig. 4 isa section taken through the sash-lock, which is shown in detail and on alarger scale.

The same reference characters indicate the same parts in all the views.

Let the numeral 5 designate a side rail of a window sash, and 6 thewindow-frame in which the sash slides. On this sash-rail iseccentrically pivoted a disk 7 by means of a screw 8, which passesthrough a bearingsleeve 9. This sleeve connects the disk with anadjusting device 10, which is mounted to turn on the sleeveindependently of the eccentric disk. A washer 12 is interposed betweenthe parts 7 and 10 to facilitate independent movement of the two parts.The part 10 is provided with a projection 10, forming a thumb-and-fingerpiece for use in adjusting the parts. The plain or unthreaded portion ofthe screw 8 passes through the sleeve, whose extremities extend slightlybeyond the connected parts and are turned outwardly, where they engagethe sash and screw-head, thus making it impossible to cause the parts 7and 10 to bind by tightening the screw, whose threaded portion entersthe sash-rail. The disk 7 is provided with a pin 7*, which the part 10engages, whereby the disk may be adj usted through the instrumentalityof the part 10. The locking edge of the cam is made thicker than itsbody portion, as shown at 7, and is provided with a facing 7 of felt,rubber, or other suitable material to enable it better to perform itsholding function. desired, this holding edge of the disk may be milledor slightly roughened for the same purpose. The facing, however, ispreferred, since it prevents the disk from marring the frame. Thethickness of the disk on the looking side, as shown at 7 increases itsholding efiiciency for the purpose stated, since it gives it a greaterbearing-surface on the frame. This increased thickness overcomes itseccentricity so far as weight is concerned, making it perfectly balancedor distributes the weight around its pivot, which is thus located at thecenter of gravity of the disk. The button or pivoted device 10 isemployed in connection with the pin 7 to adjust the disk, which may bereadily shifted from one looking position to the other. These twolocking positions are illustrated in Figs. 1 and 3. In Fig. 1 the diskis adjusted to prevent the window from moving downwardly. If an attemptis made to lower the window, the friction between the frame and the face7 of the diskwill turn the disk in the direction of the arrowin Fig. l,and thus lock the window automatically against further downwardmovement. The window may, however, be raised when the disk is in theposition to prevent downward movement, as just explained, since if araising force is applied the friction will turn the disk in thedirection of the arrow in Fig, 1.

In Fig. 3 the disk is adapted to prevent the window from movingupwardly. If an attempt is made to raise the window when the disk is inthis position, the friction will have a tendency to cause the disk tomove in the direction of the arrow in Fig. 3, whereby the Window issecurely locked against upward movement. It will be observed from theposition of the button or pivoted part 10 in Fig. 3 that the gravity ofthe button has a tendency to hold the disk in the locked position. Inmoving from the position shown in Fig. 1 to the position shown in Fig. 3the disk will be in the position shown in Fig. 2; but it is not intendedthat it shonid remain in that position, since the gravity of the button10 would have a tendency to turn it to the position shown in Fig. 3.

Having thus described my invention, what I claim is 1. In a sash lockand holder, the combination of an eccentric cam pivotally mounted on thesash-rail, an adjusting part pivotally connected with the cam and havingalimited movement independently thereof, the cam being provided with aprojection adapted to be engaged by the adj usting part, for the purposeof regulating the position of the cam, substantially as described.

2. In a sash lock and holder, the combination of an eccentric disk, anadjusting device, a bearing-sleeve connecting the two parts, theextremities of the sleeveprojecting beyond the connected parts and beingturned over thereon, and a fastening device passed through thebearing-sleeve for securing the lock to the sash-rail, the disk beingprovided with a stop arranged to be engaged by the adjusting device,substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

ERNEST PAYNE ARMSTRONG.

Witnesses:

JOHN 0. Fox, CHAS. F. PAIGE.

